Staff View: New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process

New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process

Due to the continuing growth of reverse osmosis (RO) water treatment plants worldwide, the amount of discarded end-of-life (EoL) RO membrane modules is expected to increase drastically in coming years. One of the approaches to address this problem is to transform the EoL membranes for other purposes...

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Main Authors:	Khoo, Ying Siew, Lau, Woei Jye, W. Hasan, Shadi, Wan Salleh, Wan Norhayati, Ismail, Ahmad Fauzi
Format:	Article
Published:	Elsevier Ltd 2021
Subjects:	Q Science (General) TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/95713/ http://dx.doi.org/10.1016/j.jece.2021.106731
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id	my.utm.95713
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spelling	my.utm.957132022-05-31T13:18:05Z http://eprints.utm.my/id/eprint/95713/ New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process Khoo, Ying Siew Lau, Woei Jye W. Hasan, Shadi Wan Salleh, Wan Norhayati Ismail, Ahmad Fauzi Q Science (General) TP Chemical technology Due to the continuing growth of reverse osmosis (RO) water treatment plants worldwide, the amount of discarded end-of-life (EoL) RO membrane modules is expected to increase drastically in coming years. One of the approaches to address this problem is to transform the EoL membranes for other purposes. In this study, a new approach based on sonication was studied to convert the EoL RO membrane from RO properties into microfiltration (MF) properties, offering a transformation process that was much faster (15 min) than that of typical chemical treatment process (ranging from hours to days) using oxidizing agent solution. Our results indicated that with only 15-min ultrasonication, the properties of EoL RO membrane could be significantly altered, reaching pure water permeability of 172.6 L/m2.h.bar (70-fold increment) with NaCl rejection reduced from ~80% to less than 2%. This is attributed to the deterioration of the polyamide thin selective layer atop the EoL RO membrane. As a comparison, the chemical treatment using 5000-ppm potassium permanganate (KMnO4) solution requires at least 168 h to achieve similar membrane properties. It was also found that the presence of KMnO4 during ultrasonication process could accelerate the rate of polymeric degradation, resulting in even higher pure water permeation. As a conclusion, our work demonstrated a rapid and new approach that is capable of transforming the EoL RO membrane for the filtration process of macromolecules, thus offering a practical solution to address the disposal issues of EoL RO membrane modules. Elsevier Ltd 2021-12 Article PeerReviewed Khoo, Ying Siew and Lau, Woei Jye and W. Hasan, Shadi and Wan Salleh, Wan Norhayati and Ismail, Ahmad Fauzi (2021) New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process. Journal of Environmental Chemical Engineering, 9 (6). ISSN 2213-3437 http://dx.doi.org/10.1016/j.jece.2021.106731 DOI:10.1016/j.jece.2021.106731
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	Q Science (General) TP Chemical technology
spellingShingle	Q Science (General) TP Chemical technology Khoo, Ying Siew Lau, Woei Jye W. Hasan, Shadi Wan Salleh, Wan Norhayati Ismail, Ahmad Fauzi New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
description	Due to the continuing growth of reverse osmosis (RO) water treatment plants worldwide, the amount of discarded end-of-life (EoL) RO membrane modules is expected to increase drastically in coming years. One of the approaches to address this problem is to transform the EoL membranes for other purposes. In this study, a new approach based on sonication was studied to convert the EoL RO membrane from RO properties into microfiltration (MF) properties, offering a transformation process that was much faster (15 min) than that of typical chemical treatment process (ranging from hours to days) using oxidizing agent solution. Our results indicated that with only 15-min ultrasonication, the properties of EoL RO membrane could be significantly altered, reaching pure water permeability of 172.6 L/m2.h.bar (70-fold increment) with NaCl rejection reduced from ~80% to less than 2%. This is attributed to the deterioration of the polyamide thin selective layer atop the EoL RO membrane. As a comparison, the chemical treatment using 5000-ppm potassium permanganate (KMnO4) solution requires at least 168 h to achieve similar membrane properties. It was also found that the presence of KMnO4 during ultrasonication process could accelerate the rate of polymeric degradation, resulting in even higher pure water permeation. As a conclusion, our work demonstrated a rapid and new approach that is capable of transforming the EoL RO membrane for the filtration process of macromolecules, thus offering a practical solution to address the disposal issues of EoL RO membrane modules.
format	Article
author	Khoo, Ying Siew Lau, Woei Jye W. Hasan, Shadi Wan Salleh, Wan Norhayati Ismail, Ahmad Fauzi
author_facet	Khoo, Ying Siew Lau, Woei Jye W. Hasan, Shadi Wan Salleh, Wan Norhayati Ismail, Ahmad Fauzi
author_sort	Khoo, Ying Siew
title	New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
title_short	New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
title_full	New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
title_fullStr	New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
title_full_unstemmed	New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
title_sort	new approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process
publisher	Elsevier Ltd
publishDate	2021
url	http://eprints.utm.my/id/eprint/95713/ http://dx.doi.org/10.1016/j.jece.2021.106731
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score	13.211869

New approach of recycling end-of-life reverse osmosis membranes via sonication for microfiltration process

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